Helmut Zemo, Mastermind 

Legendary Creature — Human Noble Villain
$0.23 #18432 0.00 0.2 years
Whenever Helmut Zemo attacks, you may cast target instant or sorcery card with mana value less than or equal to his power from your graveyard. If that spell would be put into your graveyard, exile it instead. If you cast a spell this way, put a +1/+1 counter on Helmut Zemo.
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Cards similar to Helmut Zemo, Mastermind expected a card that isn't here?
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Dreadhorde Arcanist94%
$0.39↑#7975↑0.11↑7.3 years↑
"Whenever this creature attacks, you may cast target instant or sorcery card with mana value less than or equal to this creature's power from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead."
Diviner of Mist86%
$0.28↑#8659↑0.21↑1.4 years↑
"Whenever this creature attacks, mill four cards. You may cast an instant or sorcery spell from your graveyard with mana value 4 or less without paying its mana cost. If that spell would be put into your graveyard, exile it instead."
Ogre Battlecaster84%
$0.22↓#24630↓0.69↑3.8 years↑
"Whenever this creature attacks, you may cast target instant or sorcery card from your graveyard by paying 
in addition to its other costs. If that spell would be put into a graveyard, exile it instead. When you cast that spell, this creature gets +X/+0 until end of turn, where X is that spell's mana value."
Kess, Dissident Mage83%
$3.80↑#3135↑0.55↑9.0 years↑
"Once during each of your turns, you may cast an instant or sorcery spell from your graveyard. If a spell cast this way would be put into your graveyard, exile it instead."
Goblin Dark-Dwellers81%
$0.26↑#8945↑0.0010.6 years↑
"When this creature enters, you may cast target instant or sorcery card with mana value 3 or less from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead."
Daring Waverider81%
$0.24↑#8881↑0.38↑2.1 years↑
"When this creature enters, you may cast target instant or sorcery card with mana value 4 or less from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead."
Efreet Flamepainter81%
$0.33↑#154090.13↑5.4 years↑
"Whenever this creature deals combat damage to a player, you may cast target instant or sorcery card from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead."
Mavinda, Students' Advocate80%
$0.52↑#10308↑0.50↑5.4 years↑
"
: You may cast target instant or sorcery card from your graveyard this turn. If that spell doesn't target a creature you control, it costs
more to cast this way. If that spell would be put into your graveyard, exile it instead. Activate only once each turn."
The Dawning Archaic78%
$1.19↑#8544↑0.000.4 years
"Whenever this card attacks, you may cast target instant or sorcery card from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead."
Bilbo, Thief in the Night78%
$13.52↑#12851↑0.000.1 years
"Whenever this card attacks, you may cast an artifact, instant, or sorcery spell from your graveyard. If an instant or sorcery spell cast this way would be put into your graveyard, exile it instead."
Seifer Almasy78%
$0.29↑#10537↑0.18↑1.2 years↑
"Whenever this card deals combat damage to a player, you may cast target instant or sorcery card with mana value 3 or less from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead."
Wishing Well78%
$0.22↓#11064↑0.25↑2.1 years↑
"
: Put a coin counter on this artifact. When you do, you may cast target instant or sorcery card with mana value equal to the number of coin counters on this artifact from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead. Activate only as a sorcery."
Caldera Pyremaw76%
$0.39↑#4521↑0.32↑1.4 years↑
"Whenever you cast an instant or sorcery spell, put a +1/+1 counter on this creature. Then this creature deals damage equal to its power to target opponent."
Maestros Ascendancy74%
$0.19↓#168810.32↑4.4 years↑
"Once during each of your turns, you may cast an instant or sorcery spell from your graveyard by sacrificing a creature in addition to paying its other costs. If a spell cast this way would be put into your graveyard, exile it instead."
Gale, Waterdeep Prodigy74%
$0.36↑#5020↑0.21↑4.2 years↑
"Whenever you cast an instant or sorcery spell from your hand, you may cast up to one target card of the other type from your graveyard. If a spell cast from your graveyard this way would be put into your graveyard, exile it instead."
Scholar of the Lost Trove74%
$0.29↑#10282↑0.44↑6.1 years↑
"When this creature enters, you may cast target instant, sorcery, or artifact card from your graveyard without paying its mana cost. If an instant or sorcery spell cast this way would be put into your graveyard, exile it instead."
Emet-Selch of the Third Seat74%
$0.35↑#3076↑0.30↑1.2 years↑
"Whenever one or more opponents lose life, you may cast target instant or sorcery card from your graveyard. If that spell would be put into your graveyard, exile it instead. Do this only once each turn."
Chandra, Acolyte of Flame74%
$0.48↑#5957↑0.077.2 years↑
"−2: You may cast target instant or sorcery card with mana value 3 or less from your graveyard. If that spell would be put into your graveyard, exile it instead."
Sins of the Past74%
$0.42↑#22614↓0.38↑20.9 years↑
"Until end of turn, you may cast target instant or sorcery card from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead. Exile this card."